Tyga and Kylie have been reportedly dating for almost a year(Getty Images)

They are yet to go public with their alleged controversial romance, nor has this relationship ever been confirmed, but Kylie Jenner and Tyga's rumoured relationship is facing another scandal. After the rapper was accused of cheating on his reputed girlfriend, 17-year-old reality star Kylie, with transgender actress Mia Isabella, Tyga has responded by denying such claims.

The rumour mill first went into overdrive when TV personality B Scott reported on the alleged fling on her blog, citing an anonymous source. In the post, the insider alleged the Rack City hitmaker had been secretly dating Isabella for over three years and claimed they use her job as a fashion stylist and consultant for his brand as a cover up.

"In her circle they made no secret of the relationship even inviting people enter their private time together," the source is quoted to have alleged in an email.

"Clearly for her he's been willing to risk it all having made plans to see each other just a couple weeks ago and never stopping their relationship through a baby mama and alleged girlfriend. They seem to have a lot of love for each other even as she was being courted by a boxer named Jean Pascal she had no interest in."

The blog also posted screenshots of alleged conversations between the 25-year-old star and Isabella, featuring a full frontal image that showed some of the rapper's identifying tattoos. It is important to note that Tyga's phone number changes halfway through the screenshots and the authenticity of the messages cannot be verified.

"The allegations are false and socially irresponsible during a time when many Americans are celebrating equality," Lee Hutton, Tyga's lawyer, said. He believes the photo of the rapper was stolen.

TMZ reports Tyga, whose real name is Michael Ray Nguyen-Stevenson, denies ever sending the photo, claiming the leaking of the picture is part of a conspiracy to ruin his name.

The father-of-one also appeared to address the scandal himself on Tuesday (7 July) in a cryptic tweet that read: "Smh. The devil is working hard today. Lol".

IBTimes UK has contacted Tyga for comment and is awaiting a reply.

The allegations come just days after it was alleged that Kylie had hired a private investigator to find out if her man was being faithful.

"Kylie's been in denial about Tyga's extracurricular activities and everyone's really struggled to convince her he's not the perfect guy she thinks he is," a source told Radar Online.

"She now wants to find out the truth for herself and has taken up Kris's offer to have him followed. She wants to know where he goes, who he's with and for how long when he's not with her. It's tearing her up inside and she's terrified about what she's going to find out."

IBTimes UK has contacted Kylie's representatives for a comment and is awaiting a reply.